The Odin Works 9mm AR9 Rifle Barrel (brand part no. B9MM16) is a 16.1-inch, medium-profile stainless steel barrel built for blowback-operated AR9 rifles chambered in 9mm Luger, cut with a 1:10 twist rate and threaded 1/2-28 at the muzzle. At 16.1 inches it clears the federal rifle minimum, so it is suited to a standard shoulder-stocked AR9 carbine build with no NFA registration required. The barrel is machined to work with either Colt-pattern or Glock-pattern magazine-fed AR9 lowers, giving builders flexibility in which magazine system they run. Odin Works builds this barrel specifically for the blowback AR9 platform rather than adapting a rifle-caliber barrel, which keeps reliability high in a pistol-caliber carbine.

Key Specifications

• Chambered in 9mm Luger for blowback-operated AR9 builds.
• 16.1-inch medium-profile barrel clears the federal rifle minimum.
• 1:10 twist rate suited to common 9mm bullet weights.
• Finished in stainless steel.
• Muzzle threaded 1/2-28 for standard 9mm muzzle devices.
• Compatible with both Colt-pattern and Glock-pattern AR9 lowers.

Frequently Asked Questions

Can this barrel be used on a standard stocked rifle? Yes, at 16.1 inches it clears the federal rifle minimum with no NFA registration required.

Which magazine systems does this barrel work with? It is machined to work with either Colt-pattern or Glock-pattern AR9 lowers.

Is the muzzle threaded? Yes, 1/2-28 for standard 9mm muzzle devices.

Buy the Odin Works AR9 Rifle Barrel

Build a reliable 9mm carbine around a barrel purpose-made for blowback operation. Order this Odin Works barrel from our AR15 barrel selection, and our Lubbock, Texas team will get it ready to ship as soon as it’s available.